An object data model is that data or code is composed of modules that combine data and procedures that work on the data.
Hi -
I'm trying to create a method that will automatically create something I can save and use later, which will let me automate data migration from one version of a class to the next.
When I compile a normal persistent class, a "storage" gets created, and I would like to be able to archive some code that would let me recreate this "old storage" so I could access an "older version" from a global and map the values into the current mapping of the class.
Hello.
For debugging purposes I sometimes need to display stack information to the current device or save it (to a global for example).
There is this snippet offered in documentation:
ClassMethod StackToDisplay()
{
For loop = 0:1:$Stack(-1) {
Write !, "Context level:", loop, ?25, "Context type: ", $Stack(loop)
Write !, ?5, "Current place: ", $Stack(loop, "PLACE")
Write !, ?5, "Current source: ", $Stack(loop, "MCODE")
Write !The attached file contains two $system.Event examples that processes work asynchronously using persistent queues:
This is a very basic example that creates some worker processes and then enqueue messages to them using $system.Event.
; create shared resource, create worker jobs. USER>do ##class(IAT.S04.Event.Test).Setup() ; enqueue some messages to workers and see what happens USER>do ##class(IAT.S04.Event.Test).Run() Show log?
Learn the basics about Caché objects.
An XML-enabled class has an XMLExport() method that knows how to serialize an instance to XML. To export all instances of a class to a file, I need to instantiate a writer and loop through the extent. Is there no class method like XMLExportToFile() that does this in one go?
I have a %Net.Request object and I want to get a full URL of the request sent (preferably after all redirects, but even full initial one would be good). For example, I have the following method:
I want to determine what service (eg. %Service_Console) is used for current process.
I can probably use some workarounds, i.e.
But is there any centralised way to get current service?
Among the outputs of our Yuzinji tool are two code metrics that it can be interesting to track over time as a development project proceeds. These are Size and XS. The first is fairly straightforward. As you write more code the size of your codebase increases. The XS metric (pronounced "excess") aims to quantify excessive structural complexity. XS is explained in some detail in this 2006 whitepaper from Headway Software, whose Structure101 toolset Yuzinji leverages.
By analyzing a codebase using Yuzinji at key milestones we can investigate how these metrics change.
[SOLVED]
added
to redirect the output to the stdout. Somehow the javac has wierd behavior with the output on errors and verbose information.
Hi,
i want the JAVA-Projections and wrappers to compile after Caché created the files. The creation of the files works 100%.
My addition to createProjection in our Projectionclass is following:
When developing or maintaining Caché Objects applications, or even ones written in plain COS code, it's sometimes useful to investigate dependencies. Yuzinji is a tool that analyzes the Caché class dictionary plus the COS code within methods and routines, then feeds its results into Structure101g Studio.
By doing this it becomes easy to ask questions such as "Who uses this piece of code?", getting the information in a format that is easy to explore further. For example, I recently analyzed all the packages in the SAMPLES namespace of the 2016.
Good morning people.
The use of TDD is currently being reference for software delivery more confiabilitade and quality.
At the company I work developing web applications , we create tests for method class in a deteminado package and running the steps that the documentation recommends:
1 export the tests classes to a predefined folder.
2- And running the test ( D ## class (% UnitTest.Manager ) .RunTest (,"/nodelete" )
It is a lot of work to do the export and run these tests would have a resource that we could only run the tests without the need for export ?
Developing an idea with RuleEngine in XData, we could even refuse from editing full class and edit only valuable xml. Sometime ago I have already written an article(in russian) about such possibility, even more, in that article I wrote about compilable JavaScript to Caché.
This possible with %Studio.AbstractDocument. While extending this class, developer should add a Projection.
Projection RegisterExtension As %Projection.
Some days ago Alberto has written a very interesting article about the usefulness of ObjectGenerators available in Caché.
In this article, Alberto shows an example RuleEngine based on XData, and how it is possible to improve the process of filling such rules. Caché Studio has a Studio Asist for XData; you may have already seen examples of it if you use ZEN or %Installer.Manifest.
We can use the %XGEN.AbstractDocument class for our task. Unfortunately, InterSystems has marked these classes (all of classes in %XGEN, in fact) as for internal use only.
Let's say the user need to execute some heavy code (build a report, or extensive calculations etc.). So, of course it needs to be asynchronous, and we possibly need to store some data about execution status. How?
The attached file contains an example of code generation using ObjectGenerators which builds a very simple homemade RuleEngine.
Code generation is an excellent way of increasing performance moving run-time calculations to compile-time.
We could generate code creating routines or implemeting methods using ObjectGenerators. In this example we are using ObjectGenerators.
Update: Rule Engine is now on GitHub https://github.
This morning on the old Caché Google Group, someone posed the following question, which I've decided to answer here, because it's interesting!
Is there a way to iterate ClassMethod's params, and get param's names and values?
The first answer I can come up with is: it's not easy! In any method, you could try to write code like this (where methodName is the name of your method):
set method = ##class(%Dictionary.MethodDefinition).IDKEYOpen($classname(), methodName)
set args = method.Do you need to build an object-oriented application using Caché? Take this course to learn how to create, retrieve, update and delete objects in Caché.
Caché Objects Introduction
Learn the basics of Caché objects. This course will provide an overview of Caché Classes, Methods, and interaction with the Caché database by creating, saving, loading and deleting objects. The lessons in this course assume that you have some previous object-oriented programming experience. Learn More.
Looking at a property defined as follows:
The documentation talks about using SqlComputed and SqlComputeCode with SqlComputeOnChange (specifying which events will trigger computation), and about using them with the Calculated keyword (so it's always computed). I don't see any specific explanation of the case above, though, when neither SqlComputeOnChange nor Calculated is specified.
What do you do if you want to have the ID field have a meaningful name for your application?
Sometimes it comes to pass that when you're making a new table that you want to have the unique row identifier (a.k.a. IDKEY) to be a field that has a name that is meaningful for your data. Moreover, sometimes you want to set this value directly. Caché fully supports this functionality and it works Suppose you have a class Test.Kyle. The data will be stored like so:
^Test.Kyle(IDKEY)=$LB("",Field1,Field2,.
The object and relational data models of the Caché database support three types of indexes, which are standard, bitmap, and bitslice. In addition to these three native types, developers can declare their own custom types of indexes and use them in any classes since version 2013.1. For example, iFind text indexes use that mechanism.